[Boost-users] Is iterator_facade still relevant in C++11, C++17?

Hi, This is a bit theoretical question, but I'd like to collect some opinions. Considering sequence of C++ versions, around where, if at all, boost::iterator_facade shines less and becomes less relevant? In other words: - If you had to implement iterators in C++11, would you use it? - If you had to implement iterators in C++17, would you use it? Has anyone observed performance issues when using iterator_facade? Best regards, -- Mateusz Loskot, http://mateusz.loskot.net